Bussmann KTN-R Eaton LIMITRON ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$487.74
Bussmann KTN-R Eaton LIMITRON Fast-Acting Fuse, Class RK1

Bussmann KTN-R Eaton LIMITRON Fast-Acting Fuse, Class RK1

(No reviews yet) Write a Review

Model: KTN-R-80

In Stock (leaves warehouse same day if ordered before 3pm ET)

$487.74
Adding to cart… The item has been added
Free Shipping on orders over $199
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like

Bussmann KTN-R-500 Eaton series KTN-R fuse, LIMITRON Fast-acting fuse, 70/30 brass end cap, Panelboards, 500 A, 1, Class RK1, Non-indicating, Blade end x blade end, 100 kAIC at 250 Vdc,200 kAIC at 250 V, Melamine glass tube, Standard, 250 V, 250 Vdc.

  • Amp rating: 500 A
  • Voltage rating: 250 V
  • Class: Class RK1
  • Interrupt rating: 200 kAIC at 250 Vac
  • Product type: Fuse
  • Dimensions (L x W x H): 10.38 x 2.59 x 2.59 in

Genuine Bussmann part number KTN-R-500.

Manufacturer Resources

Product Specs

Connection:
Blade end x blade end
Special Features:
70/30 brass end cap
Fuse Indicator:
Non-indicating
Product Subgroup:
Fuses
Class:
Class RK1
Product Group:
Circuit Protection
Packaging Type:
Standard
Voltage Rating:
250 Vac, 250 Vdc
Product Material:
Melamine glass tube
Compliances:
Not Applicable
Department:
Electrical
Product Type:
Fast-Acting Fuse
Number Of Elements:
1

Bussmann KTN-R-80 – Frequently Asked Questions

1) Will a Bussmann KTN-R fuse work in a 480V panel?
No. The KTN-R LIMITRON is a 250 volt fuse, rated 250 Vac and 250 Vdc, so it is limited to 250 volt class circuits. For a 480 or 600 volt system you need the 600 volt equivalent, the Bussmann KTS-R LIMITRON, which is the same Class RK1 fast-acting construction at 600 V.
2) Will a KTN-R fuse fit my existing Class R rejection fuse clips?
Yes. The KTN-R is a Class RK1 fuse with the Class R rejection notch, so it drops into standard Class R rejection clips and into non-rejection Class H/K clips of the same amp range. At 80 A and up these are blade end x blade end (bolt-in style) fuses, not ferrule, so the holder must be the blade type.
3) Is the KTN-R a fast-acting or time-delay fuse, and can I use it ahead of a motor?
Fast-acting. The KTN-R LIMITRON has a single element with no time delay, so it will not ride through motor inrush and is not suited to motor branch circuit protection on its own. Use it for protecting non-inductive loads, panelboards, feeders and switchboards, or as short circuit protection where a separate overload relay handles the motor. For motor circuits, the dual-element time delay Class RK1 choice is the Bussmann LPN-RK at 250 V.
4) What amp ratings does the Bussmann KTN-R fast-acting fuse come in?
Five ratings are offered: 80 A (KTN-R-80), 100 A (KTN-R-100), 225 A (KTN-R-225), 500 A (KTN-R-500) and 600 A (KTN-R-600). Order by the full part number with the amp suffix, since the body size changes with the rating.
5) What is the interrupting rating of the Bussmann KTN-R?
200,000 A interrupting at 250 Vac, and 100,000 A at 250 Vdc. That AIC covers series rating and short circuit current withstand work on most 250 volt distribution equipment, and it is the number to compare against your available fault current at the fuse location.
6) What is the Bussmann KTN-R-500 body size for fitting into a disconnect?
The 500 A KTN-R measures 10.38 x 2.59 x 2.59 inches. Check that against the fuse bay clearance in your switch or panelboard before ordering, since the lower amp ratings in the series are physically smaller.
7) Does the KTN-R have a blown fuse indicator?
No. It is non-indicating, so there is no visual flag or pop-out pin to show an open element. Crews need to meter across the fuse or pull it to confirm, which matters if you are standardizing a facility where fast troubleshooting is the priority.
8) What is the KTN-R fuse body made of?
A melamine glass tube body with 70/30 brass end caps. That construction holds up to the thermal and mechanical stress of high fault clearing, and the brass caps give a low resistance connection at the clip or bolt.
How fast can I get the Bussmann KTN-R-80 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Bussmann KTN-R-80 come with a warranty?
Absolutely. The Bussmann KTN-R-80 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Bussmann KTN-R-80?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Bussmann KTN-R-80 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
!